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<strong>\u9ad8\u3044\u53ef\u7528\u6027<\/strong> 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<strong>\u4fe1\u983c\u6027<\/strong> \u3053\u308c\u306b\u3088\u308a\u3001\u8a08\u753b\u7684\u306a\u5207\u308a\u66ff\u3048\u3068\u8fc5\u901f\u306a\u5fa9\u65e7\u304c\u53ef\u80fd\u306b\u306a\u308b\u3002.<\/p>\n<ul>\n  <li><strong>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/strong>\u30a2\u30af\u30c6\u30a3\u30d6\u30c1\u30a7\u30c3\u30af\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u30ce\u30fc\u30c9<\/li>\n  <li><strong>TTL\u6226\u7565<\/strong>\u77ed\u3044\u5024\u3001\u5236\u5fa1\u3055\u308c\u305f\u30ad\u30e3\u30c3\u30b7\u30e5<\/li>\n  <li><strong>\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/strong>\u540c\u4e00\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u30c6\u30b9\u30c8\u6e08\u307fIP<\/li>\n  <li><strong>\u30c7\u30a3\u30ca\u30bb\u30c3\u30af<\/strong>\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u304b\u3089\u306e\u4fdd\u8b77<\/li>\n  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height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308bDNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n\n<p>DNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3067\u306f\u3001\u30d7\u30e9\u30a4\u30de\u30ea\u30b5\u30fc\u30d0\u30fc\u306e\u53ef\u7528\u6027\u3092\u7d99\u7d9a\u7684\u306b\u76e3\u8996\u3057\u3001\u969c\u5bb3\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7IP\u306b\u5207\u308a\u66ff\u3048\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5b9a\u7fa9\u3055\u308c\u305f\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u304c\u5931\u6557\u3059\u308b\u3068\u3059\u3050\u306b\u3001A\u30ec\u30b3\u30fc\u30c9\u307e\u305f\u306fAAAA\u30ec\u30b3\u30fc\u30c9\u3092\u52d5\u7684\u306b\u66f4\u65b0\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3057\u307e\u3059\u3002HTTP(S)\u3001TCP\u3001UDP\u3001ICMP\u3001\u307e\u305f\u306fDNS\u306a\u3069\u306e\u30c1\u30a7\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u3001\u8a55\u4fa1\u304c\u30b5\u30fc\u30d3\u30b9\u306b\u5bfe\u5fdc\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u30b0\u30ed\u30fc\u30d0\u30eb\u30fb\u30cd\u30fc\u30e0\u30fb\u30b5\u30fc\u30d0\u30fc\u306f\u65b0\u3057\u3044\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u8fc5\u901f\u306b\u914d\u5e03\u3059\u308b\u3002 <strong>\u7a7a\u5ba4\u72b6\u6cc1<\/strong> 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<a href=\"https:\/\/webhosting.de\/ja\/dns%e3%82%a2%e3%83%bc%e3%82%ad%e3%83%86%e3%82%af%e3%83%81%e3%83%a3-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-%e3%83%aa%e3%82%be%e3%83%ab%e3%83%90-ttl%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc\/\">DNS\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3068TTL<\/a>. .\u901a\u5e38\u904b\u8ee2\u4e2d\u306fTTL\u3092\u9ad8\u3081\u306b\u8a2d\u5b9a\u3057\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u6642\u9593\u5e2f\u306fTTL\u3092\u4e0b\u3052\u308b\u3053\u3068\u3067\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3055\u308c\u305f\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u3092\u5b9f\u73fe\u3057\u3066\u3044\u308b\u3002\u3053\u3046\u3057\u3066\u3001\u79c1\u306f\u6b21\u306e\u3088\u3046\u306a\u30d0\u30e9\u30f3\u30b9\u8abf\u6574\u3092\u884c\u3063\u3066\u3044\u308b\u3002 <strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong> \u305d\u3057\u3066\u53cd\u5fdc\u901f\u5ea6\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" 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<strong>\u901a\u5e38\u904b\u8ee2<\/strong> 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<strong>\u30d7\u30ed\u30c8\u30b3\u30eb<\/strong> 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<a href=\"https:\/\/webhosting.de\/ja\/anycast-%e5%af%be-geodns-%e3%82%b9%e3%83%9e%e3%83%bc%e3%83%88-dns-%e3%83%ab%e3%83%bc%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%81%ae%e6%af%94%e8%bc%83-2025\/\">Anycast \u5bfe GeoDNS<\/a>. .\u52a0\u3048\u3066\u3001\u79c1\u306f\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u30fb\u30ce\u30fc\u30c9\u3092\u4e16\u754c\u4e2d\u306b\u5206\u6563\u3055\u305b\u3001\u30c1\u30a7\u30c3\u30af\u306f\u4e92\u3044\u306b\u72ec\u7acb\u3055\u305b\u3066\u3044\u308b\u3002\u5b9a\u671f\u7684\u306a\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30fb\u30a6\u30a3\u30f3\u30c9\u30a6\u3001\u6587\u66f8\u5316\u3055\u308c\u305f\u5909\u66f4\u3001\u30c6\u30b9\u30c8\u3055\u308c\u305f\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u30fb\u30d7\u30e9\u30f3\u306b\u3088\u3063\u3066\u3001\u79c1\u306f\u3001\u76e3\u8996\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u3066\u3044\u308b\u3002 <strong>\u30ec\u30b8\u30ea\u30a8\u30f3\u30b9<\/strong> \u76ee\u306b\u3064\u304f\u3002<\/p>\n\n\n<figure class=\"wp-block-image size-full 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<strong>\u30b3\u30d2\u30fc\u30ec\u30f3\u30b9<\/strong> 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\u306b\u6295\u7968\u3057\u305f\u3002.<\/p>\n\n<h2>DNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3068\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u3092\u8ce2\u304f\u30ea\u30f3\u30af\u3055\u305b\u308b<\/h2>\n\n<p>\u79c1\u306f\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3068DNS\u30d9\u30fc\u30b9\u306e\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u3092\u7d44\u307f\u5408\u308f\u305b\u3001\u901a\u5e38\u904b\u7528\u4e2d\u3082\u8907\u6570\u306e\u5065\u5168\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u6d41\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002\u3042\u308b\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u969c\u5bb3\u304c\u767a\u751f\u3059\u308b\u3068\u3001LB\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u305d\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u30ec\u30b9\u30dd\u30f3\u30b9\u304b\u3089\u5916\u3057\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u304c\u6b8b\u308a\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u5f37\u5316\u3059\u308b\u3002\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u306e\u5834\u5408\u3001\u79c1\u306f\u30b5\u30fc\u30d0\u30fc\u306e\u524d\u306bL4\/L7\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc\u3092\u8ffd\u52a0\u3057\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u3001TLS\u3001\u30d8\u30eb\u30b9\u3092\u7279\u5225\u306b\u5236\u5fa1\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u30ec\u30b9\u30dd\u30f3\u30b9\u30bf\u30a4\u30e0\u304c\u77ed\u7e2e\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u306a\u304f\u5b9a\u671f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u7d99\u7d9a\u3055\u308c\u308b\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a <strong>\u5bdb\u5bb9<\/strong> \u30a8\u30e9\u30fc\u306b\u5bfe\u3057\u3066\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/02\/dns_failover_guide_8732.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u6bd4\u8f03\uff1a\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308bDNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc<\/h2>\n\n<p>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30a2\u30c3\u30d7\u30bf\u30a4\u30e0\u30bf\u30fc\u30b2\u30c3\u30c8\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u6a5f\u80fd\u3001\u30b5\u30dd\u30fc\u30c8\u3001Anycast\u3084DNSSEC\u306a\u3069\u306e\u7d71\u5408\u306b\u5f93\u3063\u3066\u8a55\u4fa1\u3057\u307e\u3059\u3002\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c1\u30a7\u30c3\u30af\u3001\u77ed\u3044\u5fdc\u7b54\u6642\u9593\u3001\u5909\u66f4\u306e\u305f\u3081\u306e\u7406\u89e3\u3057\u3084\u3059\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u304c\u91cd\u8981\u3067\u3059\u3002\u30c6\u30b9\u30c8\u3067\u306f\u3001webhoster.de \u306fDNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u300199.99%\u307e\u3067\u306e\u7a3c\u50cd\u6642\u9593\u306e\u76ee\u6a19\u5024\u3001\u7d99\u7d9a\u7684\u306a\u30b5\u30dd\u30fc\u30c8\u3092\u5099\u3048\u305f\u30c8\u30c3\u30d7\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u3042\u308b\u3053\u3068\u304c\u8a3c\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30d9\u30fc\u30b7\u30c3\u30af\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u76e3\u8996\u3092\u4f34\u308f\u306a\u3044\u30b7\u30f3\u30d7\u30eb\u306a\u30be\u30fc\u30f3\u7ba1\u7406\u3057\u304b\u63d0\u4f9b\u3057\u306a\u3044\u3053\u3068\u304c\u591a\u3044\u3002\u660e\u78ba\u306a\u6bd4\u8f03\u306f <strong>\u512a\u5148\u9806\u4f4d<\/strong> \u76ee\u306b\u898b\u3048\u308b\u306e\u3067\u3001\u60c5\u5831\u306b\u57fa\u3065\u3044\u305f\u9078\u629e\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u5834\u6240<\/th>\n      <th>\u30d7\u30ed\u30d0\u30a4\u30c0<\/th>\n      <th>\u5f37\u307f<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>1<\/td>\n      <td>webhoster.de<\/td>\n      <td>DNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u300199.99%\u30a2\u30c3\u30d7\u30bf\u30a4\u30e0\u3001\u5f37\u529b\u306a\u30b5\u30dd\u30fc\u30c8<\/td>\n    <\/tr>\n    <tr>\n      <td>2<\/td>\n      <td>\u305d\u306e\u4ed6<\/td>\n      <td>\u9ad8\u5ea6\u306a\u30c1\u30a7\u30c3\u30af\u3092\u5fc5\u8981\u3068\u3057\u306a\u3044\u57fa\u672c\u6a5f\u80fd<\/td>\n    <\/tr>\n    <tr>\n      <td>3<\/td>\n      <td>\u30b3\u30f3\u30da\u30c6\u30a3\u30b7\u30e7\u30f3<\/td>\n      <td>\u9650\u3089\u308c\u305f\u5197\u9577\u6027\u3068\u7bc4\u56f2<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2>\u96fb\u5b50\u30e1\u30fc\u30eb\u3084\u305d\u306e\u4ed6\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u305f\u3081\u306e\u7279\u5225\u306a\u6a5f\u80fd<\/h2>\n\n<p>\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u304c\u672c\u5f53\u306b\u6709\u52b9\u306b\u306a\u308b\u3088\u3046\u306b\u3001\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8003\u616e\u306b\u5165\u308c\u3066\u3044\u307e\u3059\u3002\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u3064\u3044\u3066\u306f\u3001\u3044\u304f\u3064\u304b\u306eMX\u30ec\u30b3\u30fc\u30c9\u3092\u9069\u5207\u306a\u512a\u5148\u9806\u4f4d\u3067\u8a2d\u5b9a\u3057\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002 <strong>rDNS<\/strong> \u3068SPF\u306e\u30ab\u30d0\u30ec\u30c3\u30b8\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u3067\u3001\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u6b20\u5982\u306b\u3088\u308b\u914d\u4fe1\u306e\u5931\u6557\u3092\u9632\u3044\u3067\u3044\u308b\u3002DKIM\u30ad\u30fc\u306f\u4e00\u8cab\u6027\u3092\u4fdd\u3061\u3001DMARC\u306f\u5909\u66f4\u3057\u306a\u3044\u3002SMTP\u306f\u81ea\u7136\u306b\u518d\u914d\u4fe1\u3055\u308c\u308b\u305f\u3081\u3001\u77ed\u6642\u9593\u306e\u505c\u6b62\u306b\u5bfe\u3057\u3066\u306f\u7a4d\u6975\u7684\u306aDNS\u5207\u308a\u66ff\u3048\u3092\u8a08\u753b\u305b\u305a\u3001\u30ea\u30c8\u30e9\u30a4\u306b\u983c\u308b\u3002IP\u8a31\u53ef\u30ea\u30b9\u30c8\u3092\u6301\u3064API\u306b\u3064\u3044\u3066\u306f\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7IP\u3092\u30d1\u30fc\u30c8\u30ca\u30fc\u306b\u7a4d\u6975\u7684\u306b\u5831\u544a\u3057\u3066\u3044\u308b\u3002SRV\u306e\u3042\u308b\u30b5\u30fc\u30d3\u30b9\uff08SIP\u306a\u3069\uff09\u306b\u3064\u3044\u3066\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u30b7\u30fc\u30e0\u30ec\u30b9\u306b\u5207\u308a\u66ff\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u3001\u512a\u5148\u9806\u4f4d\u3068\u91cd\u307f\u4ed8\u3051\u3092\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a <strong>\u76f8\u4e92\u904b\u7528\u6027<\/strong> 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<strong>\u4fdd\u8b77\u30b7\u30fc\u30eb\u30c9<\/strong> \u3053\u308c\u306b\u3088\u308a\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u304c\u9ad8\u901f\u5316\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u30fb\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u304c\u5b89\u5b9a\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u81ea\u52d5\u5316\u3068\u30b3\u30fc\u30c9\u3068\u3057\u3066\u306e\u30a4\u30f3\u30d5\u30e9<\/h2>\n\n<p>\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3092\u81ea\u52d5\u5316\u3057\u3001\u518d\u73fe\u6027\u3001\u30c6\u30b9\u30c8\u6027\u3001\u9ad8\u901f\u6027\u3092\u7dad\u6301\u3057\u307e\u3059\u3002Git\u3067\u30be\u30fc\u30f3\u3068\u30d8\u30eb\u30b9\u30fb\u30dd\u30ea\u30b7\u30fc\u3092\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3057\u3001IaC\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5909\u66f4\u3092\u884c\u3044\u307e\u3059\u3002 <strong>\u30c9\u30e9\u30a4\u30fb\u30e9\u30f3<\/strong> 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<strong>\u64cd\u4f5c<\/strong> \u5805\u7262\u3067\u7406\u89e3\u3057\u3084\u3059\u3044\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/02\/serverraum-dns-setup-1923.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u5931\u6557\u306e\u306a\u3044\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\uff1a\u5b89\u5168\u30d9\u30eb\u30c8\u3068\u3057\u3066\u306e\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc<\/h2>\n\n<p>\u79c1\u306fDNS\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3092\u4f7f\u3063\u3066\u3001\u65b0\u3057\u3044\u30b5\u30fc\u30d0\u30fc\u306b\u79fb\u884c\u3059\u308b\u30ea\u30b9\u30af\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3066\u3044\u308b\u3002\u307e\u305aTTL\u3092\u4e0b\u3052\u3001\u6b21\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30df\u30e9\u30fc\u30ea\u30f3\u30b0\u3057\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u304c\u540c\u671f\u3055\u308c\u308b\u3088\u3046\u306b\u8a3c\u660e\u66f8\u3092\u6e96\u5099\u3059\u308b\u3002\u79fb\u884c\u4e2d\u306f\u3001\u30ed\u30b0\u3068\u30e1\u30c8\u30ea\u30af\u30b9\u304c\u5b89\u5b9a\u3059\u308b\u307e\u3067\u3001\u53e4\u3044\u30b5\u30fc\u30d0\u30fc\u3092\u30a2\u30af\u30c6\u30a3\u30d6\u306b\u3057\u3066\u304a\u304f\u3002\u5b9f\u8df5\u7684\u306a\u30ac\u30a4\u30c9\u3067\u306f\u3001\u3069\u306e\u3088\u3046\u306b\u3059\u308c\u3070 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%bc%e3%83%ad%e3%83%80%e3%82%a6%e3%83%b3%e3%82%bf%e3%82%a4%e3%83%a0%e3%81%ae%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e7%a7%bb%e8%a1%8c%e3%82%ac%e3%82%a4%e3%83%89\/\">\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u306a\u3057\u306e\u79fb\u884c<\/a> \u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4fdd\u6301\u3057\u306a\u304c\u3089\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u79c1\u306f\u79fb\u884c\u3068\u30ab\u30fc\u30d6\u306e\u30ea\u30b9\u30af\u3092\u78ba\u4fdd\u3059\u308b\u3002 <strong>\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/strong> \u305d\u3057\u3066\u8ca9\u58f2\u3002.<\/p>\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30ac\u30d0\u30ca\u30f3\u30b9<\/h2>\n\n<p>\u3092\u5f37\u5316\u3059\u308b\u3002 <strong>\u30ac\u30d0\u30ca\u30f3\u30b9<\/strong> 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<strong>\u4fe1\u983c\u6027<\/strong> \u306f\u6301\u7d9a\u7684\u306b\u5897\u52a0\u3059\u308b\u3002.<\/p>\n\n<h2>\u6307\u6a19\u3001SLO\u3001\u30b3\u30b9\u30c8<\/h2>\n\n<p>\u79c1\u306f\u30e6\u30fc\u30b6\u30fc\u30fb\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u306b\u5bfe\u5fdc\u3059\u308bSLO\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308b\uff1a <strong>\u691c\u51fa\u6642\u9593<\/strong> (TTD)\u3001time-to-switch (TTS)\u3001time-to-recover (TTR)\u3001\u304a\u3088\u3073\u53ef\u7528\u6027\u306e\u5272\u5408\u3002SLI\u3068\u3057\u3066\u3001\u79c1\u306f\u5fdc\u7b54\u6642\u9593\u3001\u30a8\u30e9\u30fc\u7387\u3001DNS\u4f1d\u64ad\uff08\u5b9f\u969b\u306b\u306f\u5b9f\u52b9TTL\uff09\u3092\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u3002\u30a8\u30e9\u30fc\u4e88\u7b97\u306f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3084\u5b9f\u9a13\u306e\u8a08\u753b\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u983b\u7e41\u306a\u5207\u308a\u66ff\u3048\u306fDNS\u3068\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306e\u30dc\u30ea\u30e5\u30fc\u30e0\u3092\u5897\u3084\u3057\u3001\u975e\u5e38\u306b\u77ed\u3044TTL\u306f\u30ea\u30be\u30eb\u30d0\u306e\u8ca0\u8377\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u6bb5\u968e\u7684\u306aTTL\u6226\u7565\uff08\u901a\u5e38\u306f\u9ad8\u304f\u3001\u8a08\u753b\u7684\u306a\u30a4\u30d9\u30f3\u30c8\u306e\u524d\u306f\u4f4e\u304f\uff09\u3092\u63a1\u7528\u3057\u3001\u6708\u5358\u4f4d\u3067\u30af\u30a8\u30ea\u3068\u30c1\u30a7\u30c3\u30af\u306e\u8ca0\u8377\u3092\u8a55\u4fa1\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066 <strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>, 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